Same for Watts Bar From: [email protected] [mailto:[email protected]] Sent: Friday, April 27, 2012 07:48 AM To: [email protected] <[email protected]> Cc: [email protected] <[email protected]>; Powernet <[email protected]> Subject: Re: Powernet: RE: Dropped ED registering faulty dose rates
The experience with DMC2000S at Cook is the same. Joe Beer, CHP Staff Health Physicist Cook Nuclear Plant, Mail Zone 9 One Cook Place Bridgman, MI 49106 audinet: 280-2262 work: 269-465-5901 ext 2262 fax: 269-466-2661 cell: 269-313-7782 [email protected] [email protected] Sent by: [email protected] 04/26/2012 11:09 AM Please respond to [email protected] To "Powernet" <[email protected]> cc Subject Re: Powernet: RE: Dropped ED registering faulty dose rates We too (San Onofre) occasionally have an ED alarm due to being dropped. Fortunately not often and the workers have been very forthcoming about what happened. Our access control system logs all alarms so these are tracked and trended along with the occasion X-ray machine induced alarm and the real ones. Eric Goldin, CHP Southern California Edison [email protected] ----- Original Message ----- From: [[email protected]] Sent: 04/26/2012 08:02 AM MST To: <[email protected]> Subject: Powernet: RE: Dropped ED registering faulty dose rates Zach, I think that you find that other users have experiences a false rate due to mechanical shock i.e., dropping the dosimeter. As rugged as the dosimeter is, it is not 100% shock proof. Your alarm response program should evaluate both the potential for an alarm to have been caused by shock as well as actually radiation. Older dosimeters can experience this condition more frequently because they have had more time to be used / dropped by workers. Dropping a dosimeter can damage sensitive electronics or jar the battery connections momentarily inducing an alarm.. OE16937 - Dose Rate Alarms On MGP DMC 2000 S Due To Mechanical Shock OE11382 - Electro-Magnetic Interference Problem with the Merlin Gerin DMC-2000 OE14697 - DMC-2000 EPD Dose Rate Alarm Caused by Induced Oscillation from New RCA Turnstile System Seth ********************************************************************** Seth J. Kanter, CHP, RRPT Sr. Health Physicist Palo Verde Nuclear Generating Station Mail Sta. 7397 5801 S. Wintersburg Rd. Tonopah, AZ 85354 Phone (623) 393-3130 Cell (602) 376-7131 or (602) 402-5764 Fax (623) 393-1853 Unless otherwise noted, all opinions are my own Liviu Librescu ********************************************************************** -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of BRAJUHA Zach(ZR) - BRUCE POWER Sent: Thursday, April 26, 2012 7:36 AM To: [email protected] Subject: Powernet: Dropped ED registering faulty dose rates Good morning, We have recently started using DMC2000S electronic dosimeters and have received several reports in the field of dose rate alarms after the device has has been dropped. We are currently working with the vendor to analyze the specific dosimeters in questions, but I'm wondering if anyone else in the industry has experienced this problem. I would like to know if this issue is specific to some of the dosimeters we have received, or if this has affected other plants? Any information is greatly appreciated. Thanks, Zach Brajuha RP FLM (Acting) Bruce Power (519) 361-2673 ext. 12851 ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected] --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. If you have received it in error, please notify the sender immediately and delete the original and any copy or printout. Unintended recipients are prohibited from making any other use of this e-mail. Although we have taken reasonable precautions to ensure no viruses are present in this e-mail, we accept no liability for any loss or damage arising from the use of this e-mail or attachments, or for any delay or errors or omissions in the contents which result from e-mail transmission. ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected] ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected] ---------------------------------------------------------------- This e-mail message and all attachments transmitted with it from the Nuclear Generation Group of American Electric Power are for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
